Commit Graph

649351 Commits

Author SHA1 Message Date
Bart Van Assche
08965c2eba Revert "sd: remove __data_len hack for WRITE SAME"
This patch reverts commit f80de881d8 and avoids that sending a
WRITE SAME command to the iSCSI initiator triggers the following:

BUG: unable to handle kernel NULL pointer dereference at 0000000000000014
TARGET_CORE[iSCSI]: Expected Transfer Length: 260096 does not match SCSI CDB Length: 512 for SAM Opcode: 0x41
IP: iscsi_tcp_segment_done+0x20b/0x310 [libiscsi_tcp]

Oops: 0000 [#1] SMP
Modules linked in: target_core_user uio target_core_iblock target_core_file iscsi_target_mod target_core_mod netconsole configfs crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 crypto_simd cryptd glue_helper virtio_console virtio_rng virtio_balloon serio_raw i2c_piix4 acpi_cpufreq button iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ext4 jbd2 mbcache virtio_blk virtio_net psmouse floppy drm_kms_helper syscopyarea
sysfillrect sysimgblt fb_sys_fops ttm drm virtio_pci
CPU: 2 PID: 5 Comm: kworker/u8:0 Not tainted 4.10.0-rc5-debug+ #3
Workqueue: iscsi_q_0 iscsi_xmitworker [libiscsi]
RIP: 0010:iscsi_tcp_segment_done+0x20b/0x310 [libiscsi_tcp]
Call Trace:
 iscsi_sw_tcp_xmit_segment+0x84/0x120 [iscsi_tcp]
 iscsi_sw_tcp_pdu_xmit+0x51/0x180 [iscsi_tcp]
 iscsi_tcp_task_xmit+0xb3/0x290 [libiscsi_tcp]
 iscsi_xmit_task+0x4e/0xc0 [libiscsi]
 iscsi_xmitworker+0x243/0x330 [libiscsi]
 process_one_work+0x1d8/0x4b0
 worker_thread+0x49/0x4a0
 kthread+0x102/0x140

Fixes: f80de881d8 ("sd: remove __data_len hack for WRITE SAME")
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Sagi Grimberg <sagi@grimberg.me>
Cc: Jens Axboe <axboe@fb.com>
Cc: Lee Duncan <lduncan@suse.com>
Cc: Chris Leech <cleech@redhat.com>
Acked-by: Christoph Hellwig <hch@lst.de>
Acked-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
2017-01-26 10:01:20 -07:00
Jens Axboe
0d4ee015d5 Merge branch 'nvme-4.10-fixes' of git://git.infradead.org/nvme into for-linus
Pull nvme target fixes from Sagi:

Given that its -rc6, I removed anything that is not
bug fix.

- nvmet-fc discard fix from Christoph
- queue disconnect fix from James
- nvmet-rdma dma sync fix from Parav
- Some more nvmet fixes
2017-01-26 09:56:15 -07:00
Linus Torvalds
bed7b01609 revert one patch missing some prereqs
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Merge tag 'drm-fixes-for-v4.10-rc6-revert-one' of git://people.freedesktop.org/~airlied/linux

Pull drm revert from Dave Airlie:
 "Revert one patch missing some prereqs.

  One of the connector fixes was missing some prereqs, we have an
  alternate driver fix that should work that I'll send tomorrow.

  Today is a holiday here so quickly smashing this out"

Daniel Vetter explains:
 "I pushed a locking change to fix a nouveau rpm issue to -fixes that
  needed the connector_list rework. And that's only in -next, but I
  missed that. Dave has the revert in a pull, and he'll follow-up with
  the hack nouveau patch for 4.10, and then we'll reapply the proper fix
  again for -next and revert the hacks. A bit a mess, but should be
  sorted soon"

* tag 'drm-fixes-for-v4.10-rc6-revert-one' of git://people.freedesktop.org/~airlied/linux:
  Revert "drm/probe-helpers: Drop locking from poll_enable"
2017-01-26 08:55:33 -08:00
Christoph Hellwig
19e420bb40 nvme-fc: use blk_rq_nr_phys_segments
Without this deallocate won't work properly due to the mismatch
of the bio/request size and the actual payload size.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
2017-01-26 17:49:14 +02:00
Parav Pandit
748ff8408f nvmet-rdma: Fix missing dma sync to nvme data structures
This patch performs dma sync operations on nvme_command
and nvme_completion.

nvme_command is synced
(a) on receiving of the recv queue completion for cpu access.
(b) before posting recv wqe back to rdma adapter for device access.

nvme_completion is synced
(a) on receiving of the recv queue completion of associated
nvme_command for cpu access.
(b) before posting send wqe to rdma adapter for device access.

This patch is generated for git://git.infradead.org/nvme-fabrics.git
Branch: nvmf-4.10

Signed-off-by: Parav Pandit <parav@mellanox.com>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
2017-01-26 17:45:03 +02:00
Sagi Grimberg
23a8ed4a62 nvmet: Call fatal_error from keep-alive timout expiration
We only need to call delete_ctrl once, so given that both
keep-alive timeout and any other fatal error can trigger it,
just make sure we only call delete_ctrl once.

Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Christoph Hellwig <hch@lst.de>
2017-01-26 17:45:03 +02:00
Sagi Grimberg
06406d81a2 nvmet: cancel fatal error and flush async work before free controller
Make sure they are not running and we can free the controller
safely.

Signed-off-by: Roy Shterman <roys@lightbitslabs.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Christoph Hellwig <hch@lst.de>
2017-01-26 17:45:00 +02:00
Sagi Grimberg
344770b07b nvmet: delete controllers deletion upon subsystem release
No reason for them to be kept around if we are
deleting the subsystem, so instead of passively
wait for the host to disconnect, actively delete
the controllers.

Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
2017-01-26 17:44:22 +02:00
James Smart
c81e55e057 nvmet_fc: correct logic in disconnect queue LS handling
Correct logic in disconnect queue LS handling.
Rework so that queue searching and error reporting is above the
section to send back a ls rjt

Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
2017-01-26 17:44:21 +02:00
Darrick J. Wong
2aa6ba7b5a xfs: clear _XBF_PAGES from buffers when readahead page
If we try to allocate memory pages to back an xfs_buf that we're trying
to read, it's possible that we'll be so short on memory that the page
allocation fails.  For a blocking read we'll just wait, but for
readahead we simply dump all the pages we've collected so far.

Unfortunately, after dumping the pages we neglect to clear the
_XBF_PAGES state, which means that the subsequent call to xfs_buf_free
thinks that b_pages still points to pages we own.  It then double-frees
the b_pages pages.

This results in screaming about negative page refcounts from the memory
manager, which xfs oughtn't be triggering.  To reproduce this case,
mount a filesystem where the size of the inodes far outweighs the
availalble memory (a ~500M inode filesystem on a VM with 300MB memory
did the trick here) and run bulkstat in parallel with other memory
eating processes to put a huge load on the system.  The "check summary"
phase of xfs_scrub also works for this purpose.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
2017-01-25 20:24:57 -08:00
David S. Miller
214767faa2 Here is a batman-adv bugfix:
- fix reference count handling on fragmentation error, by Sven Eckelmann
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Merge tag 'batadv-net-for-davem-20170125' of git://git.open-mesh.org/linux-merge

Simon Wunderlich says:

====================
Here is a batman-adv bugfix:

 - fix reference count handling on fragmentation error, by Sven Eckelmann
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-25 23:11:13 -05:00
Jakub Kicinski
529ec6ac26 virtio_net: reject XDP programs using header adjustment
commit 17bedab272 ("bpf: xdp: Allow head adjustment in XDP prog")
added a new XDP helper to prepend and remove data from a frame.
Make virtio_net reject programs making use of this helper until
proper support is added.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Acked-by: John Fastabend <john.r.fastabend@intel.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-25 22:48:40 -05:00
John Fastabend
b68df01560 virtio_net: use dev_kfree_skb for small buffer XDP receive
In the small buffer case during driver unload we currently use
put_page instead of dev_kfree_skb. Resolve this by adding a check
for virtnet mode when checking XDP queue type. Also name the
function so that the code reads correctly to match the additional
check.

Fixes: bb91accf27 ("virtio-net: XDP support for small buffers")
Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-25 22:48:17 -05:00
David S. Miller
7480888f27 Merge branch 'r8152-napi-fixes'
Hayes Wang says:

====================
r8152: fix scheduling napi

v3:
simply the argument for patch #3. Replace &tp->napi with napi.

v2:
Add smp_mb__after_atomic() for patch #1.

v1:
Scheduling the napi during the following periods would let it be ignored.
And the events wouldn't be handled until next napi_schedule() is called.

1. after napi_disable and before napi_enable().
2. after all actions of napi function is completed and before calling
   napi_complete().

If no next napi_schedule() is called, tx or rx would stop working.

In order to avoid these situations, the followings solutions are applied.

1. prevent start_xmit() from calling napi_schedule() during runtime suspend
   or after napi_disable().
2. re-schedule the napi for tx if it is necessary.
3. check if any rx is finished or not after napi_enable().
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-25 22:47:31 -05:00
hayeswang
7489bdadb7 r8152: check rx after napi is enabled
Schedule the napi after napi_enable() for rx, if it is necessary.

If the rx is completed when napi is disabled, the sheduling of napi
would be lost. Then, no one handles the rx packet until next napi
is scheduled.

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-25 22:47:30 -05:00
hayeswang
248b213ad9 r8152: re-schedule napi for tx
Re-schedule napi after napi_complete() for tx, if it is necessay.

In r8152_poll(), if the tx is completed after tx_bottom() and before
napi_complete(), the scheduling of napi would be lost. Then, no
one handles the next tx until the next napi_schedule() is called.

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-25 22:47:30 -05:00
hayeswang
de9bf29dd6 r8152: avoid start_xmit to schedule napi when napi is disabled
Stop the tx when the napi is disabled to prevent napi_schedule() is
called.

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-25 22:47:30 -05:00
hayeswang
26afec3930 r8152: avoid start_xmit to call napi_schedule during autosuspend
Adjust the setting of the flag of SELECTIVE_SUSPEND to prevent start_xmit()
from calling napi_schedule() directly during runtime suspend.

After calling napi_disable() or clearing the flag of WORK_ENABLE,
scheduling the napi is useless.

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-25 22:47:30 -05:00
Gao Pan
e13fe92bb5 i2c: imx-lpi2c: add VLLS mode support
When system enters VLLS mode, module power is turned off. As a result,
all registers are reset to HW default value. After exiting VLLS mode,
registers are still in default mode. As a result, the pinctrl settings
are incorrect, which will affect the module function.

The patch recovers the pinctrl setting when exit VLLS mode.

Signed-off-by: Gao Pan <pandy.gao@nxp.com>
Reviewed-by: Vladimir Zapolskiy <vz@mleia.com>
[wsa: added missing include]
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-01-26 00:24:23 +01:00
Alex Deucher
b9b487e494 Revert "drm/radeon: always apply pci shutdown callbacks"
This seems to break reboot on some evergreen systems.

bugs:
https://bugs.freedesktop.org/show_bug.cgi?id=99524
https://bugzilla.kernel.org/show_bug.cgi?id=192271

This reverts commit a481daa88f.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
2017-01-25 16:54:50 -05:00
Mike Looijmans
0e1929dede i2c: i2c-cadence: Initialize configuration before probing devices
The cadence I2C driver calls cdns_i2c_writereg(..) to setup a workaround
in the controller, but did so after calling i2c_add_adapter() which starts
probing devices on the bus. Change the order so that the configuration is
completely finished before using the adapter.

Signed-off-by: Mike Looijmans <mike.looijmans@topic.nl>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2017-01-25 22:07:40 +01:00
Dave Airlie
54a07c7bb0 Revert "drm/probe-helpers: Drop locking from poll_enable"
This reverts commit 3846fd9b86.

There were some precursor commits missing for this around connector
locking, we should probably merge Lyude's nouveau avoid the problem patch.
2017-01-26 06:44:03 +10:00
Florian Fainelli
f154be241d net: dsa: Bring back device detaching in dsa_slave_suspend()
Commit 448b4482c6 ("net: dsa: Add lockdep class to tx queues to avoid
lockdep splat") removed the netif_device_detach() call done in
dsa_slave_suspend() which is necessary, and paired with a corresponding
netif_device_attach(), bring it back.

Fixes: 448b4482c6 ("net: dsa: Add lockdep class to tx queues to avoid lockdep splat")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-25 14:47:44 -05:00
David S. Miller
d5bdc021ec Merge branch 'phy-truncated-led-names'
Geert Uytterhoeven says:

====================
net: phy: leds: Fix truncated LED trigger names and crashes

I started seeing crashes during s2ram and poweroff on all my ARM boards,
like:

    Unable to handle kernel NULL pointer dereference at virtual address 00000000
    ...
    [<c04116d4>] (__list_del_entry_valid) from [<c05e8948>] (led_trigger_unregister+0x34/0xcc)
    [<c05e8948>] (led_trigger_unregister) from [<c05336c4>] (phy_led_triggers_unregister+0x28/0x34)
    [<c05336c4>] (phy_led_triggers_unregister) from [<c0531d44>] (phy_detach+0x30/0x74)
    [<c0531d44>] (phy_detach) from [<c0538bdc>] (sh_eth_close+0x64/0x9c)
    [<c0538bdc>] (sh_eth_close) from [<c04d4ce0>] (dpm_run_callback+0x48/0xc8)

or:

    list_del corruption. prev->next should be dede6540, but was 2e323931
    ------------[ cut here ]------------
    kernel BUG at lib/list_debug.c:52!
    ...
    [<c02f6d70>] (__list_del_entry_valid) from [<c0425168>] (led_trigger_unregister+0x34/0xcc)
    [<c0425168>] (led_trigger_unregister) from [<c03a05a0>] (phy_led_triggers_unregister+0x28/0x34)
    [<c03a05a0>] (phy_led_triggers_unregister) from [<c039ec04>] (phy_detach+0x30/0x74)
    [<c039ec04>] (phy_detach) from [<c03a4fc0>] (sh_eth_close+0x6c/0xa4)
    [<c03a4fc0>] (sh_eth_close) from [<c0483234>] (__dev_close_many+0xac/0xd0)

As the only clue was a kernel message like

    sh-eth ee700000.ethernet eth0: No phy led trigger registered for speed(100)

I had to bisected this, leading to commit 4567d686f5 ("phy:
increase size of MII_BUS_ID_SIZE and bus_id").  Reverting that commit
fixed the issue.

More investigation revealed the crashes are due to the combination of
two things:
  - Truncated LED trigger names, leading to duplicate names, and
    registration failures,
  - Bad error handling in case of registration failures.

Both are fixed by this patch series.

Changes compared to v1:
  - Add Reviewed-by,
  - New patch "net: phy: leds: Break dependency of phy.h on
    phy_led_triggers.h",
  - Drop moving the include of <linux/phy_led_triggers.h>, as
    <linux/phy.h> no longer includes it,
  - #include <linux/phy.h> from <linux/phy_led_triggers.h>.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-25 14:40:25 -05:00
Geert Uytterhoeven
3c880eb020 net: phy: leds: Fix truncated LED trigger names
Commit 4567d686f5 ("phy: increase size of MII_BUS_ID_SIZE and
bus_id") increased the size of MII bus IDs, but forgot to update the
private definition in <linux/phy_led_triggers.h>.
This may cause:
  1. Truncation of LED trigger names,
  2. Duplicate LED trigger names,
  3. Failures registering LED triggers,
  4. Crashes due to bad error handling in the LED trigger failure path.

To fix this, and prevent the definitions going out of sync again in the
future, let the PHY LED trigger code use the existing MII_BUS_ID_SIZE
definition.

Example:
  - Before I had triggers "ee700000.etherne:01:100Mbps" and
    "ee700000.etherne:01:10Mbps",
  - After the increase of MII_BUS_ID_SIZE, both became
    "ee700000.ethernet-ffffffff:01:" => FAIL,
  - Now, the triggers are "ee700000.ethernet-ffffffff:01:100Mbps" and
    "ee700000.ethernet-ffffffff:01:10Mbps", which are unique again.

Fixes: 4567d686f5 ("phy: increase size of MII_BUS_ID_SIZE and bus_id")
Fixes: 2e0bc452f4 ("net: phy: leds: add support for led triggers on phy link state change")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-25 14:40:19 -05:00
Geert Uytterhoeven
d6f8cfa3de net: phy: leds: Break dependency of phy.h on phy_led_triggers.h
<linux/phy.h> includes <linux/phy_led_triggers.h>, which is not really
needed.  Drop the include from <linux/phy.h>, and add it to all users
that didn't include it explicitly.

Suggested-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-25 14:40:19 -05:00
Geert Uytterhoeven
8a87fca8dd net: phy: leds: Clear phy_num_led_triggers on failure to avoid crash
phy_attach_direct() ignores errors returned by
phy_led_triggers_register(). I think that's OK, as LED triggers can be
considered a non-critical feature.

However, this causes problems later:
  - phy_led_trigger_change_speed() will access the array
    phy_device.phy_led_triggers, which has been freed in the error path
    of phy_led_triggers_register(), which may lead to a crash.

  - phy_led_triggers_unregister() will access the same array, leading to
    crashes during s2ram or poweroff, like:

	Unable to handle kernel NULL pointer dereference at virtual address
	00000000
	...
	[<c04116d4>] (__list_del_entry_valid) from [<c05e8948>] (led_trigger_unregister+0x34/0xcc)
	[<c05e8948>] (led_trigger_unregister) from [<c05336c4>] (phy_led_triggers_unregister+0x28/0x34)
	[<c05336c4>] (phy_led_triggers_unregister) from [<c0531d44>] (phy_detach+0x30/0x74)
	[<c0531d44>] (phy_detach) from [<c0538bdc>] (sh_eth_close+0x64/0x9c)
	[<c0538bdc>] (sh_eth_close) from [<c04d4ce0>] (dpm_run_callback+0x48/0xc8)

    or:

	list_del corruption. prev->next should be dede6540, but was 2e323931
	------------[ cut here ]------------
	kernel BUG at lib/list_debug.c:52!
	...
	[<c02f6d70>] (__list_del_entry_valid) from [<c0425168>] (led_trigger_unregister+0x34/0xcc)
	[<c0425168>] (led_trigger_unregister) from [<c03a05a0>] (phy_led_triggers_unregister+0x28/0x34)
	[<c03a05a0>] (phy_led_triggers_unregister) from [<c039ec04>] (phy_detach+0x30/0x74)
	[<c039ec04>] (phy_detach) from [<c03a4fc0>] (sh_eth_close+0x6c/0xa4)
	[<c03a4fc0>] (sh_eth_close) from [<c0483234>] (__dev_close_many+0xac/0xd0)

To fix this, clear phy_device.phy_num_led_triggers in the error path of
phy_led_triggers_register() fails.

Note that the "No phy led trigger registered for speed" message will
still be printed on link speed changes, which is a good cue that
something went wrong with the LED triggers.

Fixes: 2e0bc452f4 ("net: phy: leds: add support for led triggers on phy link state change")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-25 14:40:19 -05:00
John Crispin
8b901f6bbc net-next: ethernet: mediatek: change the compatible string
When the binding was defined, I was not aware that mt2701 was an earlier
version of the SoC. For sake of consistency, the ethernet driver should
use mt2701 inside the compat string as this is the earliest SoC with the
ethernet core.

The ethernet driver is currently of no real use until we finish and
upstream the DSA driver. There are no users of this binding yet. It should
be safe to fix this now before it is too late and we need to provide
backward compatibility for the mt7623-eth compat string.

Reported-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: John Crispin <john@phrozen.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-25 14:36:02 -05:00
John Crispin
61976fff20 Documentation: devicetree: change the mediatek ethernet compatible string
When the binding was defined, I was not aware that mt2701 was an earlier
version of the SoC. For sake of consistency, the ethernet driver should
use mt2701 inside the compat string as this is the earliest SoC with the
ethernet core.

The ethernet driver is currently of no real use until we finish and
upstream the DSA driver. There are no users of this binding yet. It should
be safe to fix this now before it is too late and we need to provide
backward compatibility for the mt7623-eth compat string.

Reported-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: John Crispin <john@phrozen.org>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-25 14:36:02 -05:00
David S. Miller
c0d9665f08 Merge branch 'bnxt_en-rtnl-fixes'
Michael Chan says:

====================
bnxt_en: Fix RTNL lock usage in bnxt_sp_task().

There are 2 function calls from bnxt_sp_task() that have buggy RTNL
usage.  These 2 functions take RTNL lock under some conditions, but
some callers (such as open, ethtool) have already taken RTNL.  These
3 patches fix the issue by making it clear that callers must take
RTNL.  If the caller is bnxt_sp_task() which does not automatically
take RTNL, we add a common scheme for bnxt_sp_task() to call these
functions properly under RTNL.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-25 13:27:14 -05:00
Michael Chan
90c694bb71 bnxt_en: Fix RTNL lock usage on bnxt_get_port_module_status().
bnxt_get_port_module_status() calls bnxt_update_link() which expects
RTNL to be held.  In bnxt_sp_task() that does not hold RTNL, we need to
call it with a prior call to bnxt_rtnl_lock_sp() and the call needs to
be moved to the end of bnxt_sp_task().

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-25 13:27:13 -05:00
Michael Chan
0eaa24b971 bnxt_en: Fix RTNL lock usage on bnxt_update_link().
bnxt_update_link() is called from multiple code paths.  Most callers,
such as open, ethtool, already hold RTNL.  Only the caller bnxt_sp_task()
does not.  So it is a bug to take RTNL inside bnxt_update_link().

Fix it by removing the RTNL inside bnxt_update_link().  The function
now expects the caller to always hold RTNL.

In bnxt_sp_task(), call bnxt_rtnl_lock_sp() before calling
bnxt_update_link().  We also need to move the call to the end of
bnxt_sp_task() since it will be clearing the BNXT_STATE_IN_SP_TASK bit.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-25 13:27:13 -05:00
Michael Chan
a551ee94ea bnxt_en: Fix bnxt_reset() in the slow path task.
In bnxt_sp_task(), we set a bit BNXT_STATE_IN_SP_TASK so that bnxt_close()
will synchronize and wait for bnxt_sp_task() to finish.  Some functions
in bnxt_sp_task() require us to clear BNXT_STATE_IN_SP_TASK and then
acquire rtnl_lock() to prevent race conditions.

There are some bugs related to this logic. This patch refactors the code
to have common bnxt_rtnl_lock_sp() and bnxt_rtnl_unlock_sp() to handle
the RTNL and the clearing/setting of the bit.  Multiple functions will
need the same logic.  We also need to move bnxt_reset() to the end of
bnxt_sp_task().  Functions that clear BNXT_STATE_IN_SP_TASK must be the
last functions to be called in bnxt_sp_task().  The common scheme will
handle the condition properly.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-25 13:27:12 -05:00
Linus Torvalds
49e555a932 virtio, vhost: fixes
ARM DMA fixes
 vhost vsock bugfix
 
 Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

Pull virtio/vhost fixes from Michael Tsirkin:

 - ARM DMA fixes

 - vhost vsock bugfix

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  vring: Force use of DMA API for ARM-based systems with legacy devices
  virtio_mmio: Set DMA masks appropriately
  vhost/vsock: handle vhost_vq_init_access() error
2017-01-25 10:25:36 -08:00
Jason Baron
56d806222a tcp: correct memory barrier usage in tcp_check_space()
sock_reset_flag() maps to __clear_bit() not the atomic version clear_bit().
Thus, we need smp_mb(), smp_mb__after_atomic() is not sufficient.

Fixes: 3c7151275c ("tcp: add memory barriers to write space paths")
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Jason Baron <jbaron@akamai.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Reported-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-25 13:23:36 -05:00
Xin Long
5207f39963 sctp: sctp gso should set feature with NETIF_F_SG when calling skb_segment
Now sctp gso puts segments into skb's frag_list, then processes these
segments in skb_segment. But skb_segment handles them only when gs is
enabled, as it's in the same branch with skb's frags.

Although almost all the NICs support sg other than some old ones, but
since commit 1e16aa3ddf ("net: gso: use feature flag argument in all
protocol gso handlers"), features &= skb->dev->hw_enc_features, and
xfrm_output_gso call skb_segment with features = 0, which means sctp
gso would call skb_segment with sg = 0, and skb_segment would not work
as expected.

This patch is to fix it by setting features param with NETIF_F_SG when
calling skb_segment so that it can go the right branch to process the
skb's frag_list.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-25 12:28:33 -05:00
Xin Long
6f29a13061 sctp: sctp_addr_id2transport should verify the addr before looking up assoc
sctp_addr_id2transport is a function for sockopt to look up assoc by
address. As the address is from userspace, it can be a v4-mapped v6
address. But in sctp protocol stack, it always handles a v4-mapped
v6 address as a v4 address. So it's necessary to convert it to a v4
address before looking up assoc by address.

This patch is to fix it by calling sctp_verify_addr in which it can do
this conversion before calling sctp_endpoint_lookup_assoc, just like
what sctp_sendmsg and __sctp_connect do for the address from users.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-25 12:26:55 -05:00
Christoph Hellwig
493611ebd6 xfs: extsize hints are not unlikely in xfs_bmap_btalloc
With COW files they are the hotpath, just like for files with the
extent size hint attribute.  We really shouldn't micro-manage anything
but failure cases with unlikely.

Additionally Arnd Bergmann recently reported that one of these two
unlikely annotations causes link failures together with an upcoming
kernel instrumentation patch, so let's get rid of it ASAP.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reported-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2017-01-25 08:59:43 -08:00
Brian Foster
5a93790d4e xfs: remove racy hasattr check from attr ops
xfs_attr_[get|remove]() have unlocked attribute fork checks to optimize
away a lock cycle in cases where the fork does not exist or is otherwise
empty. This check is not safe, however, because an attribute fork short
form to extent format conversion includes a transient state that causes
the xfs_inode_hasattr() check to fail. Specifically,
xfs_attr_shortform_to_leaf() creates an empty extent format attribute
fork and then adds the existing shortform attributes to it.

This means that lookup of an existing xattr can spuriously return
-ENOATTR when racing against a setxattr that causes the associated
format conversion. This was originally reproduced by an untar on a
particularly configured glusterfs volume, but can also be reproduced on
demand with properly crafted xattr requests.

The format conversion occurs under the exclusive ilock. xfs_attr_get()
and xfs_attr_remove() already have the proper locking and checks further
down in the functions to handle this situation correctly. Drop the
unlocked checks to avoid the spurious failure and rely on the existing
logic.

Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2017-01-25 07:53:43 -08:00
Christoph Hellwig
76d771b4cb xfs: use per-AG reservations for the finobt
Currently we try to rely on the global reserved block pool for block
allocations for the free inode btree, but I have customer reports
(fairly complex workload, need to find an easier reproducer) where that
is not enough as the AG where we free an inode that requires a new
finobt block is entirely full.  This causes us to cancel a dirty
transaction and thus a file system shutdown.

I think the right way to guard against this is to treat the finot the same
way as the refcount btree and have a per-AG reservations for the possible
worst case size of it, and the patch below implements that.

Note that this could increase mount times with large finobt trees.  In
an ideal world we would have added a field for the number of finobt
fields to the AGI, similar to what we did for the refcount blocks.
We should do add it next time we rev the AGI or AGF format by adding
new fields.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2017-01-25 07:49:35 -08:00
Christoph Hellwig
4dfa2b8411 xfs: only update mount/resv fields on success in __xfs_ag_resv_init
Try to reserve the blocks first and only then update the fields in
or hanging off the mount structure.  This way we can call __xfs_ag_resv_init
again after a previous failure.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2017-01-25 07:49:34 -08:00
Hans de Goede
fd25ea2909 Revert "ACPI / video: Add force_native quirk for HP Pavilion dv6"
Revert commit 6276e53fa8 (ACPI / video: Add force_native quirk for
HP Pavilion dv6).

In the commit message for the quirk this revert removes I wrote:

"Note that there are quite a few HP Pavilion dv6 variants, some
woth ATI and some with NVIDIA hybrid gfx, both seem to need this
quirk to have working backlight control. There are also some versions
with only Intel integrated gfx, these may not need this quirk, but it
should not hurt there."

Unfortunately that seems wrong, I've already received 2 reports of
this commit causing regressions on some dv6 variants (at least one
of which actually has a nvidia GPU). So it seems that HP has made a
mess here by using the same model-name both in marketing and in the
DMI data for many different variants. Some of which need
acpi_backlight=native for functional backlight control (as the
quirk this commit reverts was doing), where as others are broken by
it. So lets get back to the old sitation so as to avoid regressing
on models which used to work without any kernel cmdline arguments
before.

Fixes: 6276e53fa8 (ACPI / video: Add force_native quirk for HP Pavilion dv6)
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-01-25 14:04:13 +01:00
Jani Nikula
45d9f43911 Merge tag 'gvt-fixes-2017-01-25' of https://github.com/01org/gvt-linux into drm-intel-fixes
gvt-fixes-2017-01-25

- re-enable shadow batch buffer for security that was falsely turned off.
- kvmgt/mdev typo fix for correct ABI
- gvt mail list change

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2017-01-25 13:05:39 +02:00
Daniele Ceraolo Spurio
2f5db26c2e drm/i915: reinstate call to trace_i915_vma_bind
The call went away in:

commit 3b16525cc4
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Thu Aug 4 16:32:25 2016 +0100

    drm/i915: Split insertion/binding of an object into the VM

It is useful to have this trace as it pairs nicely with the vma_unbind
one to track vma activity.
Added inside the i915_vma_bind function (was outside before) to keep a
similar placement as trace_i915_vma_unbind.

v2: print bind_flags instead of flags (Chris)

Fixes: 3b16525cc4 ("drm/i915: Split insertion/binding of an object into the VM")
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1484949083-11430-1-git-send-email-daniele.ceraolospurio@intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
(cherry picked from commit 6146e6da5c)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2017-01-25 12:57:22 +02:00
Chris Wilson
6f0f02dc56 drm/i915: Move atomic state free from out of fence release
Fences are required to support being released from under an atomic context.
The drm_atomic_state struct may take a mutex when being released and so
we cannot drop a reference to the drm_atomic_state from the fence release
path directly, and so we need to defer that unreference to a worker.

[  326.576697] WARNING: CPU: 2 PID: 366 at kernel/sched/core.c:7737 __might_sleep+0x5d/0x80
[  326.576816] do not call blocking ops when !TASK_RUNNING; state=1 set at [<ffffffffc0359549>] intel_breadcrumbs_signaler+0x59/0x270 [i915]
[  326.576818] Modules linked in: rfcomm fuse snd_hda_codec_hdmi bnep snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hwdep snd_hda_core snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device snd_timer input_leds led_class snd punit_atom_debug btusb btrtl btbcm btintel intel_rapl bluetooth i915 drm_kms_helper syscopyarea sysfillrect iwlwifi sysimgblt soundcore fb_sys_fops mei_txe cfg80211 drm pwm_lpss_platform pwm_lpss pinctrl_cherryview fjes acpi_pad parport_pc ppdev parport autofs4
[  326.576899] CPU: 2 PID: 366 Comm: i915/signal:0 Tainted: G     U          4.10.0-rc3-patser+ #5030
[  326.576902] Hardware name:                  /NUC5PPYB, BIOS PYBSWCEL.86A.0031.2015.0601.1712 06/01/2015
[  326.576905] Call Trace:
[  326.576920]  dump_stack+0x4d/0x6d
[  326.576926]  __warn+0xc0/0xe0
[  326.576931]  warn_slowpath_fmt+0x5a/0x80
[  326.577004]  ? intel_breadcrumbs_signaler+0x59/0x270 [i915]
[  326.577075]  ? intel_breadcrumbs_signaler+0x59/0x270 [i915]
[  326.577079]  __might_sleep+0x5d/0x80
[  326.577087]  mutex_lock+0x1b/0x40
[  326.577133]  drm_property_free_blob+0x1e/0x80 [drm]
[  326.577167]  ? drm_property_destroy+0xe0/0xe0 [drm]
[  326.577200]  drm_mode_object_unreference+0x5c/0x70 [drm]
[  326.577233]  drm_property_unreference_blob+0xe/0x10 [drm]
[  326.577260]  __drm_atomic_helper_crtc_destroy_state+0x14/0x40 [drm_kms_helper]
[  326.577278]  drm_atomic_helper_crtc_destroy_state+0x10/0x20 [drm_kms_helper]
[  326.577352]  intel_crtc_destroy_state+0x9/0x10 [i915]
[  326.577388]  drm_atomic_state_default_clear+0xea/0x1d0 [drm]
[  326.577462]  intel_atomic_state_clear+0xd/0x20 [i915]
[  326.577497]  drm_atomic_state_clear+0x1a/0x30 [drm]
[  326.577532]  __drm_atomic_state_free+0x13/0x60 [drm]
[  326.577607]  intel_atomic_commit_ready+0x6f/0x78 [i915]
[  326.577670]  i915_sw_fence_release+0x3a/0x50 [i915]
[  326.577733]  dma_i915_sw_fence_wake+0x39/0x80 [i915]
[  326.577741]  dma_fence_signal+0xda/0x120
[  326.577812]  ? intel_breadcrumbs_signaler+0x59/0x270 [i915]
[  326.577884]  intel_breadcrumbs_signaler+0xb1/0x270 [i915]
[  326.577889]  kthread+0x127/0x130
[  326.577961]  ? intel_engine_remove_wait+0x1a0/0x1a0 [i915]
[  326.577964]  ? kthread_stop+0x120/0x120
[  326.577970]  ret_from_fork+0x22/0x30

Fixes: c004a90b72 ("drm/i915: Restore nonblocking awaits for modesetting")
Reported-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170123212939.30345-1-chris@chris-wilson.co.uk
Cc: <drm-intel-fixes@lists.freedesktop.org> # v4.10-rc1+
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
(cherry picked from commit eb955eee27)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2017-01-25 12:42:58 +02:00
Ander Conselvan de Oliveira
6d1d427a4e drm/i915: Check for NULL atomic state in intel_crtc_disable_noatomic()
In intel_crtc_disable_noatomic(), bail on a failure to allocate an
atomic state to avoid a NULL pointer dereference.

Fixes: 4a80655827 ("drm/i915: Pass atomic state to crtc enable/disable functions")
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: intel-gfx@lists.freedesktop.org
Cc: <stable@vger.kernel.org> # v4.9+
Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1484922525-6131-4-git-send-email-ander.conselvan.de.oliveira@intel.com
(cherry picked from commit 31bb2ef97e)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2017-01-25 12:42:50 +02:00
Ander Conselvan de Oliveira
3781bd6e7d drm/i915: Fix calculation of rotated x and y offsets for planar formats
Parameters tile_size, tile_width and tile_height were passed in the
wrong order to _intel_adjust_tile_offset() when calculating the rotated
offsets.

This doesn't fix any user visible bug, since for packed formats new
and old offset are the same and the rotated offsets are within a tile
before they are fed to _intel_adjust_tile_offset(). In that case, the
offsets are unchanged. That is not true for planar formats, but those
are currently not supported.

Fixes: 66a2d927cb ("drm/i915: Make intel_adjust_tile_offset() work for linear buffers")
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Sivakumar Thulasimani <sivakumar.thulasimani@intel.com>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: intel-gfx@lists.freedesktop.org
Cc: <stable@vger.kernel.org> # v4.9+
Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1484922525-6131-3-git-send-email-ander.conselvan.de.oliveira@intel.com
(cherry picked from commit 46a1bd2895)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2017-01-25 12:42:41 +02:00
Ander Conselvan de Oliveira
21d6e0bde5 drm/i915: Don't init hpd polling for vlv and chv from runtime_suspend()
An error in the condition for avoiding the call to intel_hpd_poll_init()
for valleyview and cherryview from intel_runtime_suspend() caused it to
be called unconditionally. Fix it.

Fixes: 19625e85c6 ("drm/i915: Enable polling when we don't have hpd")
Cc: stable@vger.kernel.org
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Lyude <cpaul@redhat.com>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: intel-gfx@lists.freedesktop.org
Cc: <stable@vger.kernel.org> # v4.9+
Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1484922525-6131-2-git-send-email-ander.conselvan.de.oliveira@intel.com
(cherry picked from commit 04313b00b7)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2017-01-25 12:42:36 +02:00
Ander Conselvan de Oliveira
c34f078675 drm/i915: Don't leak edid in intel_crt_detect_ddc()
In the path where intel_crt_detect_ddc() detects a CRT, if would return
true without freeing the edid.

Fixes: a2bd1f541f ("drm/i915: check whether we actually received an edid in detect_ddc")
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: intel-gfx@lists.freedesktop.org
Cc: <stable@vger.kernel.org> # v3.6+
Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1484922525-6131-1-git-send-email-ander.conselvan.de.oliveira@intel.com
(cherry picked from commit c96b63a6a7)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2017-01-25 12:42:30 +02:00
Chris Wilson
a38a7bd176 drm/i915: Release temporary load-detect state upon switching
After we call drm_atomic_commit() on the load-detect state, we can free
our local reference. Upon restore, we only apply and free the previous state.

Fixes: 0853695c3b ("drm: Add reference counting to drm_atomic_state")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: <drm-intel-fixes@lists.freedesktop.org> # v4.10-rc1+
Link: http://patchwork.freedesktop.org/patch/msgid/20170119113749.2517-1-chris@chris-wilson.co.uk
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
(cherry picked from commit 7abbd11f34)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2017-01-25 12:42:21 +02:00